- — Limpricht erred in referring to Zygodon Fosteri (Dicks.) Mitt. Prahl's material 
from Schleswig. This, and Warstorff's Z. viridissimus var. brevifolius, and C. 
Jensen's material from Jutland, are all Z. conoideus, which is an "Atlantic 
species" occurring from Norway to Spain. The ripe brood-bodies of the various 
species furnish a reliable means of differentiation, as they differ both in shape and 
color. Z. viridissimus has a Mediterranean form simulating conoideus. Z. 
Fosteri is not closely related to the others. A colored plate illustrates the various 
brood-bodies. 
MISCELLANEOUS NOTES 
We are informed that the herbarium of the late Peter Jansen of Eisenach 
is for sale. This herbarium consists of two parts: — first, a working herbarium 
of the Mosses of central Europe, all forms save the rarest being represented by a 
selected specimen, no duplicates, with many specimens from noted students. 
Mica mounts accompany nearly all specimens, and in addition there is a very 
full set of drawings made from the specimens, representing the material published 
by Jansen in Hedwigia, Loeske's Grimmiaceae and Iconographie, and the Leber- 
moose of Rabenhorst's Flora. This portion of the herbarium fills 42 quarto 
cases. The second part contains most of the species mentioned in Limpricht, 
with many examples of each, all arranged in folio, and occupying about 18x2 feet. 
This herbarium was used for exchange and study. — E. B. C. 
We have also learned that the collection of ten to twelve thousand copies 
of Stephani's original drawings of Hepaticae, made by his daughter is for sale. 
The originals belong to the Boissier Herbarium. The copies are pencil tracings 
with appropriate data. For further informaticn re^ardirg either ccllecticn 
address Dr. Johannes Buder, University Botanical Institute, Leipzig, Germany, 
or Dr. A. W. Evans, Yale University, New Haven, Conn. — E. B. C. 
For those who are looking for a convenient holder for safety-razcr blades 
for sectioning purposes we would recommend communication with the Gits 
Company, 5512 Potomac Ave., Chicago, 111. The contrivarxe makes of the 
razor-blade a convenient pocket knife easy ard safe to manipulate ard inex- 
pensive, $1.20 per dozen. — O. E. J. 
World Metric Standardization. — A conference on World Metric Stan- 
dardization was held at the Carnegie Institute of Technology, Pittsburgh, Pa., 
September 6, 1922, in connection with the meetir.gs of the American Chemical 
Society. At this meeting twenty-seven national scientific societies were repre- 
sented by delegates. The Secretary has already published a report of the pro- 
ceedings.^ Physicists, chemistS; and pharmacists reported that in their fields 
the metric system is already in general use. Medical men, however, "reported 
a surprising inertia on the part of physicians to make use of gram and milligram 
'W. V. Bingham. Science^ N. S. 56: 362. Sept. 29. 1922. 
